In simple words: Stage 2 chronic kidney disease is a mild form of kidney disease where the kidneys are damaged and not filtering blood as well as they should. This is determined by a glomerular filtration rate (GFR) of 60-89 mL/min.

Chronic kidney disease, stage 2 (mild). Kidney damage with mild decreased GFR (60-89 mL/min). Code first any associated diabetic chronic kidney disease (E08.22, E09.22, E10.22, E11.22, E13.22) or hypertensive chronic kidney disease (I12.-, I13.-). Use additional code to identify kidney transplant status, if applicable (Z94.0).

Example 1: A patient with a history of type 2 diabetes presents with slightly elevated creatinine levels and a GFR of 75 mL/min. The physician diagnoses chronic kidney disease, stage 2., A patient with long-standing hypertension is found to have proteinuria and a GFR of 62 mL/min on routine lab work. The physician diagnoses chronic kidney disease, stage 2, secondary to hypertension., A patient with a history of kidney stones presents with recurrent urinary tract infections. Lab results reveal a GFR of 80 mL/min and evidence of kidney damage. The physician diagnoses chronic kidney disease, stage 2.

Documentation should include evidence of kidney damage (e.g., proteinuria, abnormal imaging findings) and GFR values between 60-89 mL/min. Documentation of any associated conditions, such as diabetes or hypertension, should also be included. If a kidney transplant has been performed, this should be documented as well.